ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 244

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

IBM3206K0424
IBM Processor for Network Resources
8.6: BCACH Line Valid Bytes Register
These registers are useful only in diagnostic testing of the cache logic. Each register will contain a bit signifi-
cant flag indicating which bytes in the 32-byte cache line are valid. All of these bits will be active after a cache
line fill operation has occurred, but any combination of these bits can be valid after the processor has per-
formed a write operation to memory.
Length
Type
Address
Power on Value
Restrictions
The Bus DRAM Cache Controller (BCACH)
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31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Bit(s)
31-0
Each bit indicates whether the associated byte in the cache line contains valid data or not. If the bit is set, the cache line
contains valid data and a fetch from main storage is not required to fulfill a request for a read from this location. If the bit is
reset, a read of the associated location will require a cache line fill operation before the request can complete.
32 bits
Read Only
Tag Number 0
Tag Number 1
Tag Number 2
Tag Number 3
X’0000 0000’
None
Cache Line Fill Operation Set/Reset
XXXX 1084
XXXX 10A4
XXXX 10C4
XXXX 10E4
Description
9
8
7
6
5
4
pnr25.chapt04.01
August 14, 2000
3
Preliminary
2
1
0